Lamp-socket



H. J. MOREY. LAMP SOCKET. APPLICATION FILED JULY 13. 1918.

Patented Mar. 23, 1920.

V UNITED STATES rArENr OFFICE.

HARRY J. MOREY, OF SYRACUSE, NEW YORK, ASSIGN'OR TO PASS & SEYMOUR, INCL, 0F SOLVAY, NEW YORK, A CORPORATION OF NEW YORK.

I LAMP-SOCKET.

Specification of Letters Patent.

Patented Mar. 23, 1920.

1 Application filed July 13, 1918. Serial No. 244,792.

To all whom it may concern:

Be it known that I, HARRY J. MoRnY, a citizen of the United States, and residing at Syracuse, county of Onondaga, State of l\ew York, have invented certain new and useful Improvements in Lamp-Sockets, of which the following is a specification.

The present invention relates to improvements in incandescent lamp sockets and particularly to an attachment whereby accidental disengagement of a lamp and socket is prevented and removal of the lamp from the socket can only be effected by authorized persons having a suitable key or implement to release the lock hereinafter described.

In the accompanying drawings,

Figure 1 is a view in elevation and partial section of a lamp socket embodying the invention;

Fig. 2 is a detail view, on an enlarged scale, of the locking devices removed from the socket;

Fig. 3 is a ig. 4 is a view similar to Fig. 1 illustrating a slightly modified form of the 1nvention:

Fig.5 is a sectional detail view, on an enlarged scale, of the locking device and means for supporting it in the body of the socket;

Fig. 6 is an elevation of the locking screw and support therefor removed from the socket.

Referring to the drawings A designates the hollow body of the socket which is formed of porcelain or other suitable insulating material and in the interior of which are suitably supported the terminal contacts, one of which, as usual, B is formed as a threaded shell adapted to recelve the threaded contact C on the lamp D.

Both of the embodiments of the invention illustrated are applied to keyless sockets and as shown the hollow porcelain body A is provided with a laterally projecting tubuface view of the parts shown in lar boss E which communicates at its inner be moved to and from enga ement with the inner, 'screwthreaded shell (I of the lamp, a suitable aperture b being provided in the threaded contact member B to permit such movement. The screw G when in engagement with the lamp will effectually prevent the same from being turned in the socket to disconnect it therefrom. As shown such screw is carried by and engages athread in a lateral boss h of a plate-like member H, which is arranged in a recess F in the inner face of the socket wall and is secured in position by a screw I engaging a lateral bent section at one end thereof. At'its outer end the screw Gr is provided with a head 9 of such form that it is only adapted to be engaged by a similarly shaped key or instrument which can be introduced through the outer end of the passage in the boss E. Adjacent its inner end the screw G is shown as provided with an annular. flange g which will contact with the support H and prevent said screw from being entirely withdrawn from the socket. It will be understood that the screw is to be inserted in the socket, from the inner side thereof prior to securing the threaded contact member B in position, and it thus forms a part of the socket and can not be withdrawn therefrom.

In the embodiment of the invention shown in Figs. 4 to 6 inclusive, the supporting plate K for the screw G is provided with a laterally projecting boss 71; extending into the tubular boss E on the body of the socket and has lateral deflected portions K K embedded in a suitable block of insulation material L which substantially fills the recess in the inner face of the socket wall.

The operation and advantages of the invention will it is believed be readily understood from the foregoing description in connection with the drawings. It'will be seen that it provides a very simple attachment to'a keyless lamp socket by which a lamp can be positively locked in position and only disconnected by the use or a special key so that unauthorized persons can not withdraw the same and further that there is no dan er of the lamp and socket being accidentalTy disconnected.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

The combination of an electric lamp socket adapted to have an electric lamp 10 tubular,

screwed therein and comprising a hollow body of lnsulatlng material having a groovellke recess formed 1n its inner surface, which opens through the end of the body about the mouth of the socket, and also provided with a passage extending from said recess through a lateral projection on said body, a plate extending longitudinally of said recess and having an outwardly projecting internally threaded boss extending into said passage, and a locking screw engaging the thread in said boss and having its outer end shaped to be grasped by a tool inserted in said passage and its inner end adapted to be moved to and from engaging relation with a lamp in the socket as said screw is rotated.

In testimony whereof I afiix my signature.

HARRY J. MOREY. 

